linux-kernel - [net PATCH 8/9] octeontx2-af: fix infinite loop in unmapping counter

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Date:   Tue, 16 Mar 2021 14:57:12 +0530
From:   Hariprasad Kelam <hkelam@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <kuba@...nel.org>, <davem@...emloft.net>, <sgoutham@...vell.com>,
        <lcherian@...vell.com>, <gakula@...vell.com>, <jerinj@...vell.com>,
        <sbhatta@...vell.com>, <hkelam@...vell.com>
Subject: [net PATCH 8/9] octeontx2-af: fix infinite loop in unmapping counter

Current code does not break from loop due to entry value
miscalculation. Hence correct the same.

Fixes: a958dd59("octeontx2-af: Map or unmap NPC MCAM entry and counter")
Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index 04bb080..0bd49c7 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -2490,10 +2490,10 @@ int rvu_mbox_handler_npc_mcam_free_counter(struct rvu *rvu,
 		index = find_next_bit(mcam->bmap, mcam->bmap_entries, entry);
 		if (index >= mcam->bmap_entries)
 			break;
+		entry = index + 1;
 		if (mcam->entry2cntr_map[index] != req->cntr)
 			continue;
 
-		entry = index + 1;
 		npc_unmap_mcam_entry_and_cntr(rvu, mcam, blkaddr,
 					      index, req->cntr);
 	}
-- 
2.7.4